13a

13A is an alphanumeric designation used in a variety of contexts. The most common reference is electrical: in countries with 230-volt mains, 13A is the rating of certain plug fuses and associated equipment. A 13-amp fuse in a BS 1362 plug is intended to protect the appliance’s flexible cord and is chosen for equipment with maximum loads up to about 3 kW (roughly 13 A at 230 V). The fuse is designed to blow if the current exceeds safe levels, preventing overheating and potential fire.

Beyond electrical fittings, 13A also appears as a model number, product code, or designation in manufacturing and consumer electronics, where it serves to identify a specific item in a series or catalog rather than to indicate a universal specification.

In transportation and infrastructure, 13A may appear as a route number, service designation, or code in timetables and maps, varying by city or system. In legal and regulatory contexts, 13A can denote a section, clause, or article number within statutes, regulations, or permits; its precise meaning depends on the jurisdiction and document.

Because 13A has multiple meanings across different domains, determining its exact sense requires contextual cues such as units, accompanying symbols, or the source document. When ambiguity remains, consulting the relevant standard, product datasheet, timetable, or legal text is advisable.